I have a meeting near LPL and after taking a speculative look out of interest found I can fly back to STN (which I live near) via DUB and it only takes about 50 minutes longer door-door than if I went back into the centre of Liverpool and got the train. At £24 it’s much cheaper!
If you arrive into DUB with FR from the UK, can you simply transfer airside to another FR UK flight without being funnelled out and then back going through security etc? I’ve not been to DUB for perhaps 15 years so not sure of set up. There is an hour between flights.